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Volume 43 (1977)
- Issue 6 Pages 1823-
- Issue 5 Pages 1471-
- Issue 4 Pages 1109-
- Issue 3 Pages 735-
- Issue 2 Pages 363-
- Issue 1 Pages 1-
Predecessor
- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku Kaisya Zasshi
Volume 43, Issue 2
Displaying 1-50 of 64 articles from this issue
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Ichiro Arai, Hirofumi Fujii, Saburo Homma, Yoshimoto Hoshi, Hirokazu I ...1977 Volume 43 Issue 2 Pages 363-368
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDifferential cross sections of the reactions, γ+p→p+π°, and γ+p→n+π+, are measured at about 85° and 65°, respectively, in the incident energy range from 500 MeV to 930 MeV. A tagged photon is used as an incident photon beam. Overall features are consistent with the theoretical analyses by Moorhouse Oberlack and Rosenfeld, and by Metcalf and Walker.View full abstractDownload PDF (716K) -
Teiichiro Matsuzaki, Minoru Adachi, Hiroshi Taketani1977 Volume 43 Issue 2 Pages 369-374
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe mean lifetimes of some low-lying l=1 states in 51Mn have been measured with the Doppler shift attenuation method for the 50Cr(3He, dγ) 51Mn reaction at 7.98 MeV. The values of 5.7−1.0+1.4×10−14, 7.1−1.2+1.7×10−13 and 5.2−0.9+1.3×10−14 sec. were obtained for the mean lifetimes of the 1825−[3⁄2−], 1959−[1⁄2−, (3⁄2−)] and 2140-keV [3⁄2−] levels, respectively. The experimental results are compared with a preliminary shell-model calculation assuming the 1fn7⁄2 and 1f7⁄2n−1·2p3⁄21 configurations.View full abstractDownload PDF (716K) -
Sheng-Liang Huang, Jenn-Ying Liu, Wu-Shiung Hsu, Yuen-Chung Liu1977 Volume 43 Issue 2 Pages 375-380
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe 31P(d, α)29Si reaction has been studied in the deuteron energy range from 2.0 to 3.0 MeV. The excitation functions and angular distributions are obtained for the alpha-groups leading to the seven lowest states of 29Si. The relative integrated cross sections and the differential cross sections of the excitations at 140° averaged over the incident energies both agree well with those predicted by the Hauser-Feshbach theory, which is concluded to be more preferable than the 2I+1 rule. The spin cut-off parameter value for the reaction is determined to be σ2=9. The averaged differential cross sections for the 31P(d, p)32P reaction are also obtained and compared with the 2I+1 rule and the Hauser-Feshbach theory.View full abstractDownload PDF (560K) -
Kotoyuki Okano, Yoichi Kawase, Shigeru Yamada1977 Volume 43 Issue 2 Pages 381-388
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFrom the singles spectra of γ-rays following the decay of 106Rhg measured with high resolution Ge(Li) detectors, the energies and relative intensities of 90 γ-transitions in 106Pd have been determined. Gamma-gamma coincidence measurements were performed using Ge(Li)–Ge(Li) and Ge(Li)–NaI(Tl) coincidence systems and 87 γ-transitions have been fitted into the level scheme incorporating 38 excited states. The levels at 1909.5, 2484.8, 2626.9, 3249.8, 3300.4, 3376.5 and 3401.8 keV have been newly incorporated following the decay of 106Rhg. Ambiguities of the decay scheme concerning weak transitions have been dissolved. The experimental β-strength function was calculated which showed increase with excitation energy above 1.5 MeV.View full abstractDownload PDF (828K) -
Kotoyuki Okano, Yoichi Kawase1977 Volume 43 Issue 2 Pages 389-395
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSGamma-gamma angular correlations have been measured on 23 cascading transitions in 106Pd following the decay of 106Rhg. The spins and parities of the following levels in 106Pd have been newly assigned or confirmed: 1562.2(2+), 1706.5(0+), 2001.6(0+), 2278.1(0), 2308.8(2+), 2439.1(2+), 2484.8(1−), 2500.5(2−), 2624.5(0+), 2828.3(0+), 2877.9(0+), 2902.6(2+), 2917.9(2+), 3054.8(1+), 3083.1(0), 3163.6(0), 3221.4(0+), and 3321.1 keV (0+). The E2–Ml multipole mixing ratios of 9 transitions have been derived.
The E0 transition from the two-phonon 0′+ state to the ground state was measured using a Si(Li) detector, yielding ρ(E0)=0.13±0.02.View full abstractDownload PDF (860K) -
Akira Onuki1977 Volume 43 Issue 2 Pages 396-405
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe dielectric function is calculated from the Vlasov-Boltzmann equation beyond the mean field approximation by considering the collisional effect among electrons. The collisional effect is large for any value of the plasma papameter in two dimensions. Hydrodynamic equations can be used for a fluid state in describing disturbances varying slowly in space and time because short-range correlations are large and collective modes are of low frequency in two dimensions. The dielectric function is calculated from linearized hydrodynamic equations including the presence of a magnetic field and dilute impurities. The expression is valid for small wavenumber and for a fluid state and coincides in the low density limit with that calculated from the Vlasov-Boltzmann equation. Collective modes are examined in various cases.View full abstractDownload PDF (868K) -
Takehiko Oguchi, Yohtaro Ueno1977 Volume 43 Issue 2 Pages 406-414
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe random ordered phase (ROP) proposed in a previous paper by us is investigated in a Bethe lattice. The critical temperature Tc, the random susceptibility χr and the uniform susceptibility χu are obtained rigorously by use of the effective Hamiltonian method. χr diverges at Tc, while χu makes a cusp at Tc. The spin glass phase in the Bethe lattice is discussed. It is concluded that the phase transition takes place between paramagnetic phase and ROP, and neither ferromagnetic nor spin glass phase can exist in the Bethe lattice.View full abstractDownload PDF (848K) -
Sayaka Yoshino, Makoto Okazaki1977 Volume 43 Issue 2 Pages 415-423
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electron localization is investigated numerically in the Anderson model of disordered two dimensional square lattices. The spatial behaviors of wavefunctions are examined for large systems composed of 104 sites. Computations are carried out to see the Anderson transition at the band center and to see the localization near the mobility edge.
Sharp transition at the band center is recognized and the electron localization is clearly visualized. The spatial decay rate of localized wavefunction is evaluated in the localized region and its dependence on energy or the degree of disorder is determined.View full abstractDownload PDF (1204K) -
Jun Kondo, Kunihiko Yamaji1977 Volume 43 Issue 2 Pages 424-436
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe intensity of the X-ray diffuse scattering from an electron-phonon system is calculated correct up to the second order of the electron-phonon interaction. The result consists of two terms: one is described as arising from softening of the phonon frequency due to the interaction, and the other as the shift of the center of the phonon coordinate. The former dominates when the electronic motion is faster than the phonon motion, and vice versa. It is argued that for a strongly Coulomb-correlated electron system, such as TTF–TCNQ, the electronic motion is slow enough to make the latter contribution important. A simple model for TTF–TCNQ is presented, which neglects the electron transfer entirely and for which the latter term is expressed in terms of the density correlation function of the electron system. This is calculated by applying the Monte Carlo method to a finite linear chain and also by using the hypernetted chain equation. We find a peak in the correlation function at q=4kF, which explains the 4kF anomaly in the X-ray diffuse scattering found by Kagoshima, Ishiguro and Anzai.View full abstractDownload PDF (1608K) -
Kazuyuki Matsui, Yoshika Masuda1977 Volume 43 Issue 2 Pages 437-443
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSHost nuclear spin-lattice relaxation associated with the real or virtual excitation of the localized magnetic impurity moment in superconducting dilute magnetic alloys is investigated within the framework of the depairing theory. The relaxation rate due to the real excitation is expected to depend only weakly on the superconductivity, if the drastic change of the impurity spin relaxation time does not occur, but the one due to the virtual excitation is drastically modified in the superconducting state as compared with the normal state.View full abstractDownload PDF (744K) -
Takao Suzuki, Takefumi Tsuboi1977 Volume 43 Issue 2 Pages 444-450
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElectronic specific heats under a magnetic field up to 30 kOe have been measured on ensembles of fine particles of Sn with the average radius ranging 190–500 Å over the temperature range of 1.5–6.0 K. In low fields, the broadening of the superconducting transition is explained by thermodynamical fluctuations on the assumption that they depend on a magnetic field only through the change of Tc. With increasing field, the particle-size distribution becomes dominant in the broadening.
Temperature- and size-dependences of the critical field are in good agreement with the de Gennes-Tinkham theory.
The enhancement of Tc of small particles in zero field is explained by the softening of the surface phonons.View full abstractDownload PDF (852K) -
Shin-ichiro Hatta, Masatoshi Hayakawa, Soshin Chikazumi1977 Volume 43 Issue 2 Pages 451-458
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetization measurements have been made for Fe–Ni Invar alloys in high magnetic fields up to 180 kOe at high temperatures up to 850 K. In contrast to the case of pure Fe and pure Ni, M2–H⁄M curves for Invar alloys are hardly described by Landau’s phenomenological equation in a high field region above 100 kOe. Namely, the M2–H⁄M curves are bent upward in high fields. Furthermore, it was observed that the magnetization curve is deviated upward from linearity by applying high fields in a higher temperature region. This additional magnetization over the usual one was reconfirmed by means of the transversal magnetoresistance effect measured with a pulse high field up to 300 kOe. This anomalous magnetization induced by a high field is considered to be due to re-polarization of low spin states of constituent Fe atoms.View full abstractDownload PDF (900K) -
Hidenori Kubo, Yasuhide Machida, Norikiyo Uryû1977 Volume 43 Issue 2 Pages 459-467
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNuclear transverse relaxation rates of the Cu63 and the ligand nuclei F19 and Cl35 in K2CuF4 and (CH3NH3)2CuCl4 have been studied by the pulsed NMR method in the magnetically ordered state. In a small external magnetic field the steep decrease of the relaxation rate caused by the small anisotropy field within layer as well as the two-dimensionality of these compounds has been observed. The relaxation rates due to the scattering of the electronic spin-wave (Raman process) and the indirect coupling (Suhl-Nakamura interaction) are calculated for the present nearly two-dimensional ferromagnets including the interlayer exchange interaction and the XY like anisotropy in the intralayer exchange one. It turns out that the XY like anisotropy considerably decreases the relaxation rate. The theoretical calculation agrees well with the observation.View full abstractDownload PDF (1028K) -
Hitoshi Hara, Makoto Sakata1977 Volume 43 Issue 2 Pages 468-476
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThin films of Cr were deposited on glass substrates at 20°C, 50°C, 100°C and 250°C in a vacuum of about 5×10−5 Torr. Their structural and electrical properties were investigated by means of the transmission-electron microscopy, electron diffraction and resistivity measurement. Films deposited at 100°C show the same anomaly in the electrical resistivity as that observed in the plastically deformed Cr. The Néel temperature TN, obtained from the resistivity anomaly, increases with decreasing film thickness. This shift in TN, being related to the tension due to the residual strain developed in the films, is explained in terms of the variation of the critical yield stress. In relation to the uncommensurate-commensurate transition of the spin density wave, a discussion is made on the extremely large anomaly in the resistivity of films deposited at 20°C, which consist of very fine sub-grains with an average diameter smaller than the period of the spin density wave.View full abstractDownload PDF (1460K) -
Shigeru Hirooka, Masao Shimizu1977 Volume 43 Issue 2 Pages 477-482
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe volume paramagnetostriction of disordered alloys is calculated in the itinerant electron model. By assuming transfer energys and the number of d-electrons to vary with volume change, a general expression for the volume dependence of spin paramagnetic susceptibility is derived from the results for the spin paramagnetic susceptibility of a disordered binary alloy which is obtained in the coherent potential approximation and the t-approximation for the electron correlation. Numerical estimations of the spin paramagnetic susceptibility and its volume dependence are given for Pd–Rh, Ni–Rh and Pt–Ni alloys and a good agreement with experiments is obtained. It is found that a volume dependence of the transfer energy or the bandwidth has a main effect on the volume paramagnetostriction.View full abstractDownload PDF (800K) -
Keisuke Tajima, Yoshikazu Ishikawa, Peter J. Webster, Michael W. Strin ...1977 Volume 43 Issue 2 Pages 483-489
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe spin waves in a Heusler alloy Cu2MnAl were investigated at several temperatures by neutron inelastic scattering. The spin wave dispersion relations along three principal directions were systematically explored across the whole magnetic Brillouin zone at 4 K. The results were analysed using the Heisenberg Hamiltonian with long range magnetic interactions. At T=493 K (T⁄Tc=0.78), the renormalization of the spin wave energy at large momentum transfer regions was found to be very small. This result is interpreted in terms of the temperature dependence of the s-d interaction at large distances.View full abstractDownload PDF (904K) -
Shin-ichiro Hatta, Takeshi Sugeno1977 Volume 43 Issue 2 Pages 490-493
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSReversible permeability of α-Iron containing nitrogen was measured in a weak bias field up to 2 Oe. A discontinuous increase of reversible permeability of a single crystal took place at a critical bias field owing to a stabilization effect of nitrogen atoms. This fact was explained in terms of the theory of the magnetic after effect proposed by Néel and the anisotropy energy coefficient ω was estimated from this measurement to be 2.6×10−16 erg per atom.View full abstractDownload PDF (404K) -
Tsuneaki Goto, Mitsuru Hasegawa, Tamio Nishinomiya, Yasuaki Nakagawa1977 Volume 43 Issue 2 Pages 494-498
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Faraday rotation and magnetic circular dichroism in thin films of ferromagnetic nickel are measured with He–Ne laser light (λ=632.8 nm) up to a temperature slightly above the Curie point Tc. The results near Tc can satisfactorily be analyzed on the assumption that the magneto-optical parameters Q1 and Q2 are proportional to the magnetization, regardless of whether the magnetization is spontaneous or induced by applied fields. Slight deviations from the proportionality are found at lower temperatures; temperature coefficients of both Q1 and Q2 are somewhat larger than those of the spontaneous magnetization.View full abstractDownload PDF (592K) -
Masatsugu Suzuki, Hiroyoshi Suematsu, Sei-ichi Tanuma1977 Volume 43 Issue 2 Pages 499-504
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA frequency mixing of the de Haas-van Alphen oscillations in bismuth was found. The Fermi energy changes at magnetic fields where the Landau level crosses the Fermi energy, so that the Fermi energy shows a pseudo periodic variation with the fields. This variation is remarkable even at a low magnetic field in bismuth. The observed frequency mixing is ascribed to this effect.View full abstractDownload PDF (680K) -
Tadao Ishii1977 Volume 43 Issue 2 Pages 505-511
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe dipole model of electromagnetic-wave radiation in amplified acoustic waves predicts results consistent with experimental ones, some of which suggest the existence of up- and down-conversion processes in n-InSb. Threshold-, frequency- and field-dependence of the radiation are found characterized by threshold-, frequency- and field- dependence of the acoustic amplification.View full abstractDownload PDF (956K) -
Masasi Inoue, Yoshiyuki Kaku, Hisao Yagi, Toshiaki Tatsukawa1977 Volume 43 Issue 2 Pages 512-518
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electrical resistivity, Hall coefficient, and X-band EPR spectra have been measured over the temperature range from 300 to 77 K in the Bridgman-grown Pb1−xSnxTe (0≤x≤1) mixed crystals doped with 0.01 wt.% Mn as a probe. In accordance with a variation of the band gap with composition x, the electrical properties vary between the respective values for the two component semiconductors, but their behaviors are characterized by two regions; a Pb-rich side for x<0.3 and a Sn-rich side for x>0.4. In this mixed system alloy scattering is ineffective. With increasing x the hyperfine structure constant A of Mn2+ in the EPR spectra decreases drastically up to x=0.3∼0.4 and remains constant at higher tin composion, showing a stronger chemical affinity of Mn2+ with Sn atoms than Pb atoms. Only a limited range 0.1<x<0.4 there appear small lines due to forbidden transitions. In conclusion, the change in the electrical quantities with x is closely related with that in the chemical bonding nature in Pb1−xSnxTe.View full abstractDownload PDF (868K) -
Koichi Imanaka, Takeshi Iida, Hiroshi Ohkura1977 Volume 43 Issue 2 Pages 519-528
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Γ4−-mode phonon interaction in the relaxed excited state (RES) of the F center has been investigated through a theoretical study of the Stark effects on the RES, as an extension of the Kayanuma and Toyozawa theory. The general expressions of the temperature dependence of both the Stark polarization P(T) and the radiative life time τ(T) are derived. They include two parameters; 2s–2p electronic energy difference Δ, and Γ4−-phonon coupling constant S1. These parameters are determined by theoretical curve-fitting of the experimental data of P(T) for potassium and rubidium halides. They give a consistent explanation of τ(T) for KF, KCl, KBr, and RbCl, and also give the values of the other important parameters of the RES. It is concluded that, in the RES, Δ≥0; this implies that the 2s state lies either below the 2p states or degenerates with them before introducing the electron-phonon coupling.View full abstractDownload PDF (1176K) -
Arao Nakamura1977 Volume 43 Issue 2 Pages 529-537
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLuminescence spectra in As-doped Ge under intense optical excitation have been observed for varying donor concentration 2.0×1014 to 4.9×1018 cm−3 and for varying average density of electron-hole pairs (e-h pairs) in the crystal. From the variation of the luminescence lineshapes with the average density of e-h pairs and the theoretical analysis of lineshapes, it is found that even in heavily doped Ge the electron-hole drops (EHD) is stably formed in an atmosphere of metallic electrons and ionized donor impurities. Time resolved spectra at extremly high excitation levels confirm the EHD model of non-equilibrium plasma in heavily doped Ge.View full abstractDownload PDF (1156K) -
Takashi Sakuma, Keiichi Iida, Koji Honma, Hideo Okazaki1977 Volume 43 Issue 2 Pages 538-543
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn oscillatory background and Debye lines of α-Ag2Se which has so-called averaged structure were studied by X-ray diffraction experiments. The diffuse background was analyzed by assuming a liquid-like distribution of Ag atoms and the pair distribution function gAg–Ag(r) was obtained. The calculated intensities of Debye lines by the liquid-like Ag distribution model agreed qualitatively with the observed intensities. Therefore, it is not necessary for Ag atoms to be confined to 42 sites which were introduced by Rahlfs. A mean potential UAg(r) of Ag atoms was calculated from the mean density distribution of Ag atoms ρAg(r), and was related to an asymmetric thermal vibration of Ag atoms in α-Ag2Se.View full abstractDownload PDF (676K) -
Mitsuo Wada, Hiromoto Uwe, Akikatsu Sawada, Yoshihiro Ishibashi, Yutak ...1977 Volume 43 Issue 2 Pages 544-547
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn the ferroelectric phase below T3(93 K) of K2SeO4 a new soft-mode, belonging to the B2 representation, has been observed by means of Raman scattering experiment. This mode is different from the soft A1 mode previously reported to soften as T2 (129.5 K) was approached from below. The frequency of this newly observed mode is about 13.2 cm−1 at 9.8 K, and decreases as the temperature increases. The observed result is discussed in connection with the successive phase transitions in the K2SeO4 crystal.View full abstractDownload PDF (448K) -
Kêitsiro Aizu1977 Volume 43 Issue 2 Pages 548-556
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA second-order transition between a prototypic and a commensurate ferroic phase is considered. The concept of the “catastrophe indices” of the soft modes is introduced for their thermal behavior when T→Tc−0 (it is assumed that the ferroic phase occurs below Tc). Presented are some cases where the catastrophe indices are all 1 and some cases where the indices are not all 1. A general theory is constructed which manifests that a nonunity catastrophe index causes certain extraordinary types (which differ according to different values of faintness index) of T dependence of electric susceptibility (κ) and elastic compliance near Tc. One of these types is: κ∝(T−Tc)−1 at T>Tc, κ∝(Tc−T)−2 at T<Tc. Another is: κ=temp. indep. at T>Tc, κ∝(Tc−T)−1 at T<Tc.View full abstractDownload PDF (852K) -
Kenkichi Okada, Hiroshi Sugié, Ken-ichi Kan’no, Kazuhiro ...1977 Volume 43 Issue 2 Pages 557-562
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFor the antiferroelectric transition, three phases, antipolar, nonpolar and polar were considered under bias field with comparisons to the phenomenological theory previously developed. Bias effect on the antipolar to nonpolar transition is zero to the first order approximation, and the shift of the transition to the lower temperature is quadratic to applied field. Under strong field, succesive transitions, antipolar-polar-nonpolar, appear, where the antipolar-polar transition is shifted to the lower temperature by increasing bias. The shift of the polar-nonpolar transition to the higher temperature by bias is much smaller than that of the former transition. These results were confirmed in ADP and CFT experimentally. A mere shift to the lower temperature by bias field could not be taken as an indication of the antipolar-nonpolar (antiferroelectric) transition, which has been believed so far. The field dependence of the shift must be checked.View full abstractDownload PDF (768K) -
Kazuo Gesi, Kunio Ozawa1977 Volume 43 Issue 2 Pages 563-569
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe pressure-temperature phase diagram of ferroelectric NH4HSO4 was studied by means of dielectric and differential thermal analysis (DTA) measurements in a pressure and temperature region of p\lesssim8×103 kg cm−2, −120°C\lesssimT\lesssim200°C. The high pressure phase found by Bridgman above about 1×103 kg cm−2 at room temperature is proven not to be identical with the low temperature non-ferroelectric phase (Phase III) at 1 atm. The liquidus line was newly determined by DTA. A new high pressure phase (Phase VI) was found above 4×103 kg cm−2 just below the melting point. A change in the order of the transition at the upper Curie point was found at about 0.6×103 kg cm−2.View full abstractDownload PDF (744K) -
Kazuo Gesi, Kunio Ozawa1977 Volume 43 Issue 2 Pages 570-574
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe pressure-temperature phase diagram of (NH4)3H(SO4)2 was studied by means of dielectric and differential thermal analysis measurements in a range of p\lesssim8.5 kbar, −100°C\lesssimT\lesssim150°C. The I–II transition point (140°C at 1 atm) linearly decreases with increasing hydrostatic pressure with a slope of −5.76 deg kbar−1. The pressure dependence of the II–III transition point is expressed by a quadratic equation Tc=Tc0+Kp+γp2 with parameters of Tc0=−8.1°C, K=−3.7 deg kbar−1, and γ=−0.13 deg kbar−2. Two pressure-induced ferroelectric phases (Phases VI, VII) are found above about 5 kbar. The II–III–VI triple point is found at p=7.0 kbar, T=−40.5°C.View full abstractDownload PDF (460K) -
Shunsuke Hirotsu, Tomonobu Suzuki, Shozo Sawada1977 Volume 43 Issue 2 Pages 575-582
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSound velocities in perovskite-type crystal CsPbBr3 have been measured around the structural phase transition points at 88 and 130°C. “Detwinned” samples were used, which made it possible to relate the measured velocities to the elastic constants in each phase. The velocities of c11 and c11−c12 modes exhibit large anomalies above and below the two transition points, whereas that of c44 mode is almost independent of temperature throughout the transition region. The results are compared with the consequences of phenomenological and fluctuation theories. Temperature dependence of the velocity of c11 mode just above the higher transition point is shown to be consistent with the prediction from the fluctuation theory.View full abstractDownload PDF (932K) -
Electrical Conductivity of Bond-Type Disordered Systems —Effect of Fluctuation of Transfer Energies—Kozo Hoshino, Mitsuo Watabe1977 Volume 43 Issue 2 Pages 583-591
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe theory for the electrical conductivity of bond-type disordered systems is formulated in the single-bond coherent-potential approximation and applied to calculate the conductivity of some model systems as functions of the energy and the degree of disorder. The results are discussed in connection with the electron localization problems such as the bond percolation problem and the Anderson localization problem with fluctuation of transfer energies.View full abstractDownload PDF (888K) -
Shunji Sugai1977 Volume 43 Issue 2 Pages 592-599
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSResonant enhancement of Raman scattering by extraordinary phonons with macroscopic electric field is observed in CuGaS2 at 85 K and at room temperature. The incident photon which induces resonance has an energy near that of A-exciton, when both incident and scattered lights are polarized parallel to the optic axis, and near B- or C-exciton, when both lights are polarized parallel to each other but perpendicular to the optic axis. This dependence on the incident photon energy and polarization demonstrates the importance of the intraband Fröhlich electron-phonon interaction. The resonance behavior by A1-phonon is also observed. This is explained by the deformation potential interaction.View full abstractDownload PDF (952K) -
Toshio Sanematu1977 Volume 43 Issue 2 Pages 600-604
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe NV1 absorption band of polypeptides in the β-form is discussed on the basis of vibronic exciton treatment. The adopted model is different from the one of free-exciton theory merely in that the freedoms of the CN stretching vibration in individual residues are taken into account explicitly. The calculated absorption bands for the antiparallel and the parallel sheets are compared with the experimental data of poly-L-lysine in the β-form observed by Rosenheck et al. It is concluded, in agreement with Pysh, that the experimental observations correspond to the antiparallel sheet. Numerical values of transition monopoles, bond lengths and force constants of the CN bond are all assumed to be the same as those of the isolated peptide group.View full abstractDownload PDF (576K) -
Nobuyuki Toshima1977 Volume 43 Issue 2 Pages 605-609
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe calculations using the impact parameter method employed in paper I [N. Toshima: J. Phys. Soc. Japan 42 (1977) 633] are extended to lower energies. The cross sections for 10S1⁄2→10P1⁄2, 10S1⁄2→10P3⁄2 and 10P1⁄2→10D3⁄2 are also calculated. The Glauber approximation is also applied to these processes and it is in good agreement with the impact parameter method down to 1.25 eV for proton impact and down to 1.36×10−3 eV for electron impact. A simple semiempirical formula is proposed, which agrees well with the impact parameter method and the Glauber approximation for all the processes over the whole energy range studied in this article.View full abstractDownload PDF (572K) -
Nobuyuki Toshima1977 Volume 43 Issue 2 Pages 610-618
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Glauber scattering amplitudes for arbitrary transitions of the hydrogen atom by proton (or electron) impact have been obtained in a closed form. The inelastic cross sections between highly excited states of the hydrogen atom by electron impact are calculated and compared with the Born cross sections. At energies below a few eV, the Glauber cross sections are smaller than the Born cross sections by an order-of-magnitudeView full abstractDownload PDF (780K) -
Tohru Sugimoto, Masato Oishi, Hideo Suzuki1977 Volume 43 Issue 2 Pages 619-626
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOn the stereoisomers of bilitriene with no ionic structure in their π-systems, their wavelengths and oscillator strengths of absorption are calculated by the ZDO approximation of the LCAO–ASMO–SCF–CI theory of π-electrons. The interaction of the π-systems with a point-dipole is also investigated using the stationary perturbation theory for degenerate states.
It is thus shown that a stereoisomer of bilitriene with no ionic structure in its π-system can explain the observed absorption spectrum of Pr, and that an interaction between such stereoisomer and a point-dipole is further necessary to reproduce the observed spectrum of Pfr. The photoisomerization of a terminal pyrrole ring is also concluded to be probable for the origin of Pr–Pfr conversion.View full abstractDownload PDF (844K) -
Takao Ishinabe1977 Volume 43 Issue 2 Pages 627-633
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theory based on Kirkwood’s mean-field approximation is presented in order to elucidate the nature of a solid-state phase transition associated with rotational fluctuations about chain axes. Simultaneous equations describing states of the system are obtained and are solved for several restricted cases. A first-order phase transition with the latent heat of 19 cal/CH2mol is predicted at 339 K for C22 n-paraffine; it well explains the empirical rotational phase transition, but the latent heat is far less than experimental values.View full abstractDownload PDF (716K) -
Kaoru Mino, Hiroyuki Murakami1977 Volume 43 Issue 2 Pages 634-641
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWithout an assumption employed by Furth et al., numerical steady-state solutions of a D-T toroidal plasma are obtained in a self-consistent way from the momentum, energy and Maxwell equations for ions and electrons. The solutions satisfy the following requirements for the toroidal plasma in a power plant: 1) The ion temperature at the central part of plasma is high enough to feed a sufficient output power due to thermonuclear fusion reaction; 2) at the boundary, on the other hand, the ion temperature is so low as to keep the blanket out of thermal damages; 3) the safety factor with respect to screw instability is greater than 2 everywhere in the plasma.View full abstractDownload PDF (788K) -
Kunizo Ohkubo, Kazumi Ohasa, Kiyokata Matsuura1977 Volume 43 Issue 2 Pages 642-647
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe ray trajectories of electrostatic wave to the lower hybrid (LH) resonance on the meridian plane of torus is significantly modified as compared with that without shear. The ray starting from the vicinity of the plasma surface rotates spirally around the magnetic axis. The ray reaching the layer S=0, where the perpendicular dielectric constant vanishes, is not terminated but reflected along the second characteristic curve towards another point on the layer S=0. After being reflected successively, rays finally converge on the node point of the layer S=0 on the equatorial plane. In the absence of he layer S=0 the rays infinitely reflect between the cutoff layers near the center and surface of plasma and cover all the region between the layers.View full abstractDownload PDF (672K) -
Ken Kawasaki1977 Volume 43 Issue 2 Pages 648-654
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSSpectral line profiles of He I 4922 Å line (21P-41D, 1F) and 4471 Å line (23P-43D, 3F) with their forbidden components from a small linear theta pinch plasma have been measured and the plasma satellites have been observed on the wing of the line profiles. The observed profiles have broadened wings, and they are interpreted as the Doppler broadening due to fast neutral particles produced by the charge transfer with hot ions in the plasma of the neutral particle density of ∼1014 cm−3 comparable with the plasma density. The low and high frequency fluctuating fields with the average strength of several kV/cm are deduced from the plasma satellites in the observed profiles.View full abstractDownload PDF (868K) -
Tadatsugu Hatori, Y. C. Lee, Toshio Tange1977 Volume 43 Issue 2 Pages 655-661
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA real-space quasilinear theory is developed for the collisional and the collisionless drift waves in a plasma with a sheared magnetic field of slab geometry. The equation obtained describes the interaction between many localized modes around different rational surfaces through the density modulation of the energy source region of each mode. The wave amplitudes approach to the stationary values through a relaxation oscillation process. When the width xs of the energy source region becomes comparable to the spacing Δx of the two adjacent rational surfaces, diffusion coefficient due to the wave is enhanced over the classical value, while the nonlocal heat transport due to the wave propagation is shown to be negligible compared to that associated with the diffusion process.View full abstractDownload PDF (740K) -
Masakazu Mori, Toshio Goto, Shuzo Hattori1977 Volume 43 Issue 2 Pages 662-668
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIt has been shown that the electron density in a positive column He–Cd+ laser discharge, where the electron energy distribution is non-Maxwellian, can be determined conveniently with the same modified double probe method as used in the case of the Maxwellian electron energy distribution. This method can be applied to other positive column He-metal laser discharges at medium pressures generally.View full abstractDownload PDF (824K) -
Kimiaki Konno, Teruo Mitsuhashi, Yoshi H. Ichikawa1977 Volume 43 Issue 2 Pages 669-674
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDynamical processes of the dressed ion acoustic solitons have been numerically analyzed by solving the coupled set of the first order Korteweg-de Vries equation and the second order equation, which has been derived on a basis of the reductive perturbation theory. A single soliton dressed by clouds of the second order perturbation potential exhausts ion acoustic wave behind when it travels down free space. On the other hand, in collision processes of two dressed solitons, the clouds around the Korteweg-da Vries soliton core redistribute themselves in such a way to equalize the heights of colliding pairs. Structure of the clouds suggests that effective attractive interaction acts between the colliding pairs of the dressed solitons.View full abstractDownload PDF (640K) -
Yoshi H. Ichikawa, Teruo Mitsuhashi, Kimiaki Konno1977 Volume 43 Issue 2 Pages 675-683
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSContribution of higher order terms in the reductive perturbation theory has been investigated for nonlinear propagation of strongly dispersive ion plasma wave. The basic set of fluid equation is reduced to a coupled set of the nonlinear Schrödinger equation for the first order perturbed potential and a linear inhomogeneous equation for the second order perturbed potential. A steady state solution of the coupled set of equations has been solved analytically for the case of nonlinear amplitude modulation of the ion acoustic wave, which is nothing but the small wave number limit of the strongly dispersive ion plasma wave.View full abstractDownload PDF (660K) -
Takayasu Tanaka1977 Volume 43 Issue 2 Pages 684-691
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA simple systematic method is presented to seek for models of one-dimensional nonlinear lattices, which admit exactly solvable steady motion. Each atom is assumed to interact with its nearest neighbors. Some examples are given, focusing attension on the cases where steady motions are described by elliptic functions.View full abstractDownload PDF (752K) -
Junkichi Satsuma, David J. Kaup1977 Volume 43 Issue 2 Pages 692-697
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA Bäcklund transformation in bilinear forms is presented for a higher order Korteweg-de Vries equation, which is a natural extension of the Korteweg-de Vries equation written in a bilinear form. The Bäcklund transformation in ordinary forms and the inverse scattering scheme are given for this higher order equation. Also, the first eleven of the infinity of conservation quantities for this equation are derived from the Bäcklung transformation.View full abstractDownload PDF (564K) -
M. Rahman, R. A. Usmani1977 Volume 43 Issue 2 Pages 698-700
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe solution of a biharmonic equation governing the bending of a rectangular elastic plate by using finite Fourier sine transform method is considered. A particular form of the intensity function has been chosen to demonstrate the method. This result is checked by using the extremum principle of the functional of the biharmonic equation.View full abstractDownload PDF (252K) -
Masatoshi Koshiba1977 Volume 43 Issue 2 Pages 701-702
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCosmic ray muon experiments are reevaluated with respect to their outcome and feasibility.View full abstractDownload PDF (316K) -
Yoshinori Manmoto, Koh Utsunomiya, Mitsuo Satoh1977 Volume 43 Issue 2 Pages 703-704
Published: August 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe experimental observation of multiple-quantum transitions of Na nuclei in a NaCl single crystal by the rotary-saturation method is reported. Results are discussed by using a second quantization formalism and n-th order time-dependent perturbation in the second rotating frame.View full abstractDownload PDF (244K) -
Norio Ohta, Tadashi Ikeda, Fumihiko Ishida, Yutaka Sugita1977 Volume 43 Issue 2 Pages 705-706
Published: August 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSNew high g(gyromagnetic ratio) garnets for magnetic bubble applications have been found. In (La Tm Ca)3 (Fe Ge)5 O12 films, g becomes larger than 20, and the saturation wall velocity exceeds 1800 m/s. The mechanism of high g’s in these garnets can be explained by high magnetic losses of rare earth ions in the garnet. It is concluded that high g garnets can be obtained by using not only Eu3+ ion but also almost all magnetic rare earth ions except Gd3+.View full abstractDownload PDF (260K)